Finding the Fourth Proportional to 1,286,264,196.42, 1,929,488,513.58 and 538,527,518.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,286,264,196.42 : 1,929,488,513.58 = 538,527,518.61 : x
2. Step 2: Convert to fraction form
   1,286,264,196.42/1,929,488,513.58 = 538,527,518.61/x
3. Step 3: Cross multiply
   1,286,264,196.42x = 1,929,488,513.58 × 538,527,518.61
4. Step 4: Simplify right side
   1,286,264,196.42x = 1,039,082,661,404,734,720
5. Step 5: Solve for x
   x = 1,039,082,661,404,734,720/1,286,264,196.42
6. Step 6: Final answer
   x = 807,829,887.75